Blowing-engine or compressor.



No. '7x-30,911. Patented January 24, 1905.

UNITED STATES PATENT OFFICE.

GUSTAV BERNHARD PETSCHE, OF PHILADELPHIA, PENNSYLVANIA, AS- SIGNOR TO SOUTHVVARK FOUNDRY & MACHINE COMPANY, OF PHILA- DELPHIA, PENNSYLVANIA, A CORPORATION OF PENNSYLVANIA.

BLOWlNG-ENGINE OR COMPRESSOR.

SPECIFICATION forming part of .Letters Patent No. 780,911, dated January 24, 1905.

I A Application filed June 5, 1903. Serial No. 169,140. I

T @ZZ whom 777/001/ @Ownh i YD3 indicates a filling-piece used in connec- Be it known that I, GUsTAv BERNHARD tion with the portion of the guideway indi- 50 `PE'rsOI-IE, a 'subject of the Emperor of Crer-v cated at d. many, residing in the city and county of Phila- EE indica-te conduits leading from points delphia, in the State of Pennsylvania, have in the cylinder A to the inner endsof cylininvented a certain new and useful Improveders D, each of these conduits, as'shown, emment in Blowing-Engines or Compressors, of bodying the valve-box E', (shown in sectionin 554 which the following is a true and exact de- Fig, 3,) and. which permits the air to pass scription, reference being had to the accompafreely from the cylinder A to the actuating- IO nying drawings, which form a part thereof. cylinder D, but affords only a restricted pas- My invention relates to blowing-engines or sage for the backward passage of the air. compressors, and particularly to the mechan- F is a' rod which is given a reciprocating 60 ism for actuating the delivery-valves of such motion by some part of the engine (not shown) engines, my object being to provide a new, and so as to move in fixed relation to the I5 effective, and convenient device for this purcompressing-piston in the cylinder A. To the pose, the nature of which will be best underrod F is fastened a regulating-slide F2,`movstood as described in connection with the draw- 1 ing through the guideways Z d of one of the 65 4ings in which it is illustrated, and in whichcylinders and connected -by a rod F with a Figure lis a view showing a portion of the similar but reversed cam-slide F3, moving in compressing-cylinder and receivers ofthe the guideways of the second valve-actuating blowing-engine with the delivery-valve-actucylinder. ating mechanism shown in section. Fig. 2 is Cr G, &c., indicate bolts which hold the 70 a sectional view on the line 2 2 of Fig. l; cylinder-sections D and D' together. Fig. 3, a sectional view of the valve-boXE, The operation of the device is easily foland Fig. 4 a sectional view of the restricted lowed, it being understood that in the position escape-passage E2. shown both delivery-valves are closed, the

A indicates the compressing-cylinder; B B, compressingpiston .just at the point of be- `75 the receivers at the ends of this cylinder; C C, ginning its movement toward the right, and the stems of the delivery-valves, one of which the rod F and connected parts moving toward is shown in section at the vleft-hand side of the left, the delivery-valve at the left-hand Fig. l. These stems connect directly with side of the cylinder having justv closed by the pistons indicated at C and moving in the action of the cam F2 operating, through the 8O inner ends of the cylinders D, and these piscam-roller Ct, on the piston C land valve-rod tons'in turn are connected by the arms `C3 C3V C. It will be seen that as the compressingwith pistons C2, moving in the outer ends of piston moves toward the right the connected the cylinders D D-` and the arms C3, as shown cam-slide F3 moves toward the left, leaving in Figs. 1 and 2, afford bearings for cam-rolls, contact with the cam-roll C1, so that the air 85 (indicated at C4.) compressed in the right-hand cylinder A will D and D indicate separable sections making `pass through conduit E in to the right-hand 40 up the valve-actuating cylinder, these sections cylinder D, so that when the pressure at the being bolted together, as by bolts G, (shown right-hand side of the cylinder A and in the in Fig. 2,)and being formed with transverselyright-hand receiver B is substantially in equiextending guideways, (indicated at a? and 03'.) librium the air-pressure in the cylinder D, Dzindicatesacock secured in the outer end acting on the piston C', will press it out- 45 of the valve-actuating cylinder and arranged, ward, the connected piston C2 by' compressas shown in Fig. 4, to admit air freely to the ing the air in the end D of the actuating-cylcylinder and permit its exhaust therefrom inder cushioning the outward movement of through a restricted passage. the parts, but lpermitting the fulll opening movement of the valve, owing to the gradual escape of air through the restricted passage indicated at D2, and it will be understood that as the compressing-piston H completes its stroke the cam-slide F3, moving in the opposite direction from that indicated by the arrow, Will have assumed the position indicated at the right-hand side of Fig. 1, closing the right-hand delivery-valve, while the cam F2 will be just at the point Where its movement toward the right Will leave the actuated piston of the left-handdelivery-valve free to open on the reverse movement of the compressingpiston.

In my application for Letters Patent filed April 20, 1903, Serial No. 153,450, 1 have shown and described a valve-actuating cylinder of the general character shown and claimed in this application; but in said other application the said device is only claimed in connection with features of construction alternative to and different from the specific devices shown and described in the present application.

Having now described my invention, what I claim as new, and desire to secure by Letters Patent, is-

1. As a device for actuating the delivery- Valve of a blowing-engine or compressor, the cylinder D, D', having guideways for a slide extending transversely through its walls, in combination with a conduit E, connecting the inner end of the cylinder with the compressing-cylinder, a regulated escape-passage for air connecting with the rear end of the cylinder, pistons Working' in the inner and outer ends of the cylinder, said pistons being connected together and with the stem oi the delivery-valve, a reciprocating slide working through the guideways on the cylinder and between the pistons, and means actuated by said slide for moving the pistons toward the inner end of the cylinder when the slide moves in one direction and leaving them iree to more toward the outer end of the cylinder when the slide moves in the other direction.

2. As a device for actuating the deliveryvalve oi' a blowing-engine or compressor, the cylinder D, D', having guideways for a slide extending transversely through its walls, in combination with a conduitE, connecting the inner end oi' the cylinder with the compressing-cylinder, a regulated escape-passage for air connecting with the rear end of the cylinder, pistons working in the inner and outer ends of the cylinder, said pistons being connected together and with the stem of the delivery-valve, a cam-contacting part situated between and secured to move with the pistons, a reciprocating slide working through the guideways on the cylinder and between the pistons, and a cam on said slide arranged to contact with the cam-contacting part and through it move the pistons inward when the slide moves in one direction and to leave the piston free to move outward when the slide moves in the other direction.

GUSTAV BERNHARD lll'lSCllll.

Witnesses:

CHAs. A. MYERS, D. S'rmvAirr. 

